Hello,
I'm still trying to do some linear algebra with sage.
sage: var('x1,y1,z1, x2,y2,z2, x3,y3,z3')
(x1, y1, z1, x2, y2, z2, x3, y3, z3)
sage: var('p1,p2,p3')
(p1, p2, p3)
sage: var('x,y,z')
(x, y, z)
sage: var('alpha, beta')
(alpha, beta)
sage: p1 = transpose(matrix([[x1,y1,z1]]))
sage: p1
[x1]
[y1]
[z1]
sage: p2 = transpose(matrix([[x2,y2,z2]]))
sage: p3 = transpose(matrix([[x3,y3,z3]]))
sage: alpha = p2 - p1
sage: alpha
[x2 - x1]
[y2 - y1]
[z2 - z1]
sage: beta = p3 - p1
sage: beta
[x3 - x1]
[y3 - y1]
[z3 - z1]
sage: alpha[0]
( x2 - x1)
At this point I wnat to make a matrix that looks like this:
x y z
alpha[0] alpha[1] alpha[2]
beta[0] beta[1] beta[2]
My efforts always end in an error.
Thanks for any help you can offer.
Roger
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